Circulating microRNA-144-5p is associated with depressive disorders

Area of Science:

• Biochemistry
• Genetics
• Psychiatry

Background:

• Depressive and anxiety disorders are prevalent global mental illnesses.
• The study investigates the novel association between plasma microRNAs (miRNAs) and depression/anxiety in primary care.
• This research is the first to explore this specific link in a primary care setting.

Purpose of the Study:

• To identify potential plasma microRNA (miRNA) biomarkers for depression and anxiety.
• To explore the association between specific miRNAs and depressive symptoms in primary care patients.
• To determine if plasma miR-144-5p levels correlate with depression severity.

Main Methods:

• Screening of 179 miRNA primer sets in plasma samples from 11 patients.
• Validation of differentially expressed miRNAs using quantitative real-time PCR (qRT-PCR) in 169 patients and 52 controls.
• Linear regression analysis to assess the relationship between plasma miR-144-5p and depression scores (MADRS-S).

Main Results:

• Plasma miR-144-5p levels were significantly lower in depression/anxiety patients compared to healthy controls at baseline.
• Plasma miR-144-5p levels increased significantly after 8-week follow-up in patients.
• Plasma miR-144-5p expression was inversely related to depression score (MADRS-S) at baseline.

Conclusions:

• Plasma miR-144-5p levels are significantly associated with depressive symptoms.
• Lower baseline plasma miR-144-5p may indicate a predisposition to depression.
• Plasma miR-144-5p shows potential as a peripheral biomarker for depression-related pathological processes.